Benchmark three-month copper prices on the London Metal Exchange are trading at around $6,800 a tonne, having rallied around 16.5 percent since the end of March 2017.

Prices have fallen by around 6.7 percent since the start of this year, however, amid concerns over cooling demand growth in China, the world's top consumer of the red metal.

Jiangxi Copper, an integrated producer owning both mines and smelters, plans to raise production of copper cathodes, which are used to make products such as copper wire and cable, by 3.6 percent this year to 1.42 million tonnes.

In its Friday filing, the company did not provide a production figure for the first quarter.